Double tower speaker



FIG. 1 is a top perspective view showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right view thereof; and,

FIG. 6 is a top view thereof.

The broken lines in the drawings depict portions of the double towerspeaker that form no part of the claimed design.

CLAIM The ornamental design for a double tower speaker, as shown anddescribed.